Locomotive crank axle



. April 2o, 1926.` y 1,581,982

J. W. POLLOCK' ET AL LOCOMOTIVE CRANK AXLE Filed Jan. 29, 1936 laill Cil Patented Apr.- 20, 1926.

`UNITED STATES 1` PATENT OFFICE.

JOHN W'. POLLOCK, OF RIDLEY PARK, PENNSYLVANIA, AND LAWRENCE L. NEEBE, 0F WOODBURY, NEW JERSEY, ASSIGNORS TO THE BALDWIN LOCOMOTIVE WORKS, 0F PHILADELHIA, PENNSYLVANIA, A CRPORAIION 0F PENNSYLVANIA.

LocoMoajIvE GRANK AXLE.

Application led. January 29, 1926. Serial No. 84,682.

To all whom t may concern.

Beit known that we, JOHN IV. POLLOCK and LAWRENCE L'. Nanne, citizens of the United States, residing, respectively, in Ridley Park, Pennsylvania, and Woodbury, New Jersey, have invented Improvements in Locomotive Crank Axles, ot' which the following is a specification.

The object of our invention is to provide a crank-axle for a three-cylinder locomotive, wherein the driving-wheels, secured t0 said axle, are located inside the frame of the locomotive.

The invention is particularly adapted to narrow gauge locomotives, Vwherein the space between the wheels is insufficient to permit the use of the ordinary crank cheekpieces.

In the accompanying drawing:

Fig. l is aV sectional vview through the crank and wheels of alocomotive, a portion of the crank-shaft being in full lines;

F ig. 2 is a longitudinal sectional view of thev central connecting rod and the means o'l" maintaining it in correct position on the crank, and

Fig. 3 is a sectional view illustrating a inodilication of the invention.

l-l constitute a pair of driving-wheels of a. locomotive.- These wheels are each formed with a cast metal center 2 and an integral axle extension 3, which projects through the journal box on the frame of the locomotive, and has at its outer end an outside crank 4, shown by dotted lines. 5 is a case-hardened steel bushing, driven onto the axle portion 3 as shown.

Extending between the pair of wheels l-1 and to the rotational center line of `the wheels, is a crank-shaft 6, driven intok center as in Fig. 1, these extensions may be formed, as shown in Fig. 3, comprising separate sections 3a, driven into the wheel center 2a and keyed thereto.

The above elements are comparatively cheap to manufacture and assemble, and provide a substantial construction; and, furthermore, such construction provides sufficient clearance between the wheels, particularly of a narrow gauge locomotive, for the free movement of all parts, which would otherwise be restricted in a construction wherein the ordinary crank-axles with eX- tended cheek-pieces are used.

This construction also affords free access to the rod journal brasses, so that they may be renewed without taking down the rod, the collars 9--9 being released from the grooves S-fS, as illustrated in broken lines in F ig. 2, for the purpose.

le claim:

l. The combination of two wheels spaced apart and having axle extensions on the outside only, said extensions being integral with the wheel centers; and a crank-shaft extending from one wheel to the other, said crank-shaft being'located at one side or' the central line through the wheels.r

2. The combination of two wheels spaced apart and having axle sections on the outside only, said sections being integral with the wheel-centers; a crank-axle driven into openings in the wheel-centers, said axle being grooved; and collars mounted in the grooves and acting to center the middle main-rod journal 'mounted on the raxle between the collars.

3. rEhe combination of a pair of concentrically aligned wheels; a shaft extending between and secured to the saidwheels, being disposed eccentrically of said center of alignment of said wheels, and forming a. crank by which said wheels may be driven; a connecting rod rotatably mounted on said crank shaft; journal brasses in said rod; grooves in said crank-shaft adjacent the opposite sides of said connecting rod; and collars movably adapted to said grooves, whereby the brasses orp said connecting rod may be renewed without taking down the said rod.

IUHN IV. POLLOCK. LAVVRENGE L. NEEBE. 

